From 333c8b97785d5afd5085ba3720b4d259623290f6 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 15 Mar 2010 20:26:04 -0300 Subject: [media] v4l: v4l2_subdev userspace format API Add a userspace API to get, set and enumerate the media format on a subdev pad. The format at the output of a subdev usually depends on the format at its input(s). The try format operation is thus not suitable for probing format at individual pads, as it can't modify the device state and thus can't remember the format tried at the input to compute the output format. To fix the problem, pass an extra argument to the get/set format operations to select the 'try' or 'active' format. The try format is used when probing the subdev. Setting the try format must not change the device configuration but can store data for later reuse. Data storage is provided at the file-handle level so applications probing the subdev concurently won't interfere with each other. The active format is used when configuring the subdev. It's identical to the format handled by the usual get/set operations. Signed-off-by: Laurent Pinchart Signed-off-by: Stanimir Varbanov Signed-off-by: Sakari Ailus Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- include/linux/Kbuild | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/Kbuild') diff --git a/include/linux/Kbuild b/include/linux/Kbuild index c33f22a6a404..43918a34db9f 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -372,6 +372,7 @@ header-y += usbdevice_fs.h header-y += utime.h header-y += utsname.h header-y += v4l2-mediabus.h +header-y += v4l2-subdev.h header-y += veth.h header-y += vhost.h header-y += videodev2.h -- cgit v1.2.2